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| − | =Oral Qualifying Exam-March 2019=
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| − | =Annual review-May 2020=
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| − | =Thesis Outline=
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| − | # Introduction
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| − | ##Magnetized electron beam
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| − | ##Applications of the magnetized electron beam
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| − | ###Electron cooling of ion beam
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| − | ##Jefferson Lab magnetized electron beam for the JLEIC cooler
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| − | #Generation of the magnetized electron beam
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| − | Experimental setup (DC HV gun, photo cathode, RF laser, solenoid, etc.)
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| − | Beam diagnostics
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| − | == Beam dynamics ==
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| − | Beam matrix
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| − | Phase space
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| − | Emittance (thermal, phase space, geometric)
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| − | Effective(drift) emittance (emittance of the magnetized beam)
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| − | Measuring the beam emittance
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| − | == Space charge effect ==
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| − | Space charge effect in the magnetized beam
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| − | == Simulations on the magnetized electron beam ==
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| − | ASTRA
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| − | Initial particle distribution
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| − | Field maps (3D E field map, 2D B field map)
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| − | Space charge calculation mechanism
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| − | Emittance
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| − | GPT
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| − | Initial particle distribution (Laser*QE image processing)
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| − | Field maps (3D E field map, 2D B field map)
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| − | Space charge calculation mechanism
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| − | Emittance
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| − | Post-processing (MATLAB)
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| − | == Characterization of the magnetized beam ==
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| − | Experimental method
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| − | Beam size vs solenoid I
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| − | Rotation angle vs solenoid I
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| − | Emittance vs solenoid I - two different laser sizes
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| − | Emittance vs laser spot sizes - max solenoid current
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| − | ASTRA/GPT simulations (Simulation of all the above variations)
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| − | Conclusions (comparisons -measurements vs simulations, mismatch oscillations, negative rotation angles, etc.)
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| − | 7 Experiments a
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| − | == Headline text ==
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| − | nd numerical simulations of the space charge dominated magnetized beam
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| − | Experimental methods
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| − | Pulse energy vs extracted charge -for different magnetizations
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| − | Space charge current limitation dependence on gun high voltage- for different magnetizations
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| − | Space charge current limitation dependence on pulse width- for different magnetizations
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| − | Space charge current limitation dependence on laser spot size- for different magnetizations
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| − | GPT simulations
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| − | Conclusions (Comparison -measurements and simulations) …
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| − | == Redesiging and performance of the photogun ==
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| − | Gun designing
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| − | CST electrostatic design
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| − | GPT simulations implementing the new gun field map
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| − | Polishing and gun assembly
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| − | High voltage conditioning
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| − | == Repeated experimental and numerical simulations results of the space charge dominated magnetized beam with the new photogun ==
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| − | == Conclusions ==
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| | [[Sajini Wijethunga | Return to Sajini Wijethunga]] | | [[Sajini Wijethunga | Return to Sajini Wijethunga]] |
